Ravensburger The Earth 540 Piece 3D Jigsaw Puzzle Ball for Kids and Adults - Easy Click Technology Means Pieces Fit Together Perfectly HIGH QUALITY COMPONENTS  Ravensburgers 3D jigsaw puzzles will bowl you over with premium quality, in terms of both content and material. PRECISION FIT  No matter how large or small our puzzles, each is precision made so that every piece fits perfectly. EASY CLICK TECHNOLOGY  Individual pieces are so precisely made that you can actually hear a click when you fit a piece into the correct place. 3D JIGSAW PUZZLE - This puzzle is meant to be displayed after it's built. It's 3D, and highly durable. LONG TERM QUALITY - Ravensburger has been making products for the hand, head, and heart for over 130 years.